Countdown
Counts down to a moment: an expiration, a release, a meeting.
What it shows
Days, hours, minutes, and seconds to go, dropping units as they reach zero, and Done! at the end. The target is a fixed moment, so everyone who opens a shared workspace counts down to the same time.
Settings
Configure sets the Target Date & Time, or a Preset from now, from 1 minute to 1 day. Give it a title so you know what it counts to.